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Questions of the Week (Week of 3/31/14): What is CHM? What is HW?

(see Glossary page for more info)

Topic ideas for tutorials, discussion sessions and journal clubs:


Conference: Key questions related to wave -- mean-flow interactions:

1. What is a jet and how does it form?

2. What does PV mixing mean? What is the mechanism? How is it quantified?

3. How do wave-like motions at the small scales interact with ambient rotation and stratification to produce large-scale flows (including jets, super- and differential-rotation, angular momentum transport, etc.) and coherent vortices?

4. What are the practical limits of reduced flow models (e.g., quasi-geostrophic, shallow-water, primitive, and Euler) that filter out different types of waves?

5. Atmospheres can have highly symmetric zonal mean flows, but many problems (including ocean basins) involve much less symmetric flows with, for instance, time-dependent vortices. Can theories be developed to describe such flows?

6. How do correlations between highly anisotropic and inhomogeneous small-scales and the large-scale motions and domain boundaries precisely arise?

7. What are the mechanisms that drive large-scale flows in giant planets, stars and disks?

8. What is the role of magnetic fields in modifying conservation laws and in driving organized flows in astrophysical bodies?

9. How do systematic magnetic fields and the fluctuations in those fields interact?

10. What is the nature of wave-flow interaction in the context of turbulence, transport, and pattern selection in magnetized plasmas – especially in tokamaks, including ITER?

11. An absolutely crucial element in the turbulence dynamics is the zonal flow generation by turbulent Reynolds stresses. What is the precise mechanism for this non-local (in scale space) wave-flow interaction?

12. What is the physics of the magnetic counterpart of zonal flow, the zonal field, and its relation to dynamic phenomena?

13. What is the optimal, tractable model -- beyond simple, adiabatic quasilinear theory? How does one implement this?